Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f875ed0d3d8795ac983ca2719ad240b7062a7cb280e01247c4db9305ae26e49' 
  AND token = '+SlyePa+tmTV8tzrKJV5y1LBBBlHNOTmJ4ezGM4Lvog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}